- Gemstones: Facts, photos, and information for over 100 gems.
Diamond A collection of photos, articles, facts, maps and graphs about diamonds
- Emerald: The Worlds Most Popular Green Gem, May Birthstone
Emerald is usually a fractured stone that does not have the alluvial durability to persist great distances from its source Emerald also has a specific gravity of 2 7 to 2 8, which is not significantly different from quartz, feldspar, and other common materials found in stream sediments
- Rocks: Pictures of Igneous, Metamorphic and Sedimentary Rocks
Sedimentary Sedimentary Rocks: Photos and facts about clastic, chemical and organic sedimentary rocks
- Limestone: Rock Uses, Formation, Composition, Pictures
Crushed limestone is used as a filter stone in on-site sewage disposal systems Powdered limestone is also used as a sorbent (a substance that absorbs pollutants) at many coal-burning facilities Limestone is not found everywhere It only occurs in areas underlain by sedimentary rocks
- Tanzanite: What you need to know about color, rarity, value
It is easy to see why Tiffany's called tanzanite "the most beautiful blue stone to be discovered in 2000 years " Stones of this quality might be purchased by museums, investors, or collectors, or used in custom or designer jewelry
- Amethyst: The most popular purple gem, February birthstone
Amethyst is the most popular purple gem It is a February birthstone, New Age gem, chakra stone, variety of quartz It is inexpensive, durable, and used in all types of jewelry
- Tigers-Eye Gemstones | Tiger Eye Beads, Jewelry, Tumbled Stones
Tiger's-eye, also called "tiger eye" and "tigers eye," is a very popular gemstone that displays a chatoyancy (cat's-eye) when a polished stone is moved back and forth in incident light
- Jade: A beautiful and durable material of nephrite or jadeite
Jade has been used to make tools, gemstones, and sculptures for thousands of years It was independently selected as a stone suitable for royalty by cultures in all parts of the world
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